BIOL-203-604 2025 FA Anatomy and Physiology I at Howard Community College
Access The Exact Questions for BIOL-203-604 2025 FA Anatomy and Physiology I at Howard Community College
💯 100% Pass Rate guaranteed
🗓️ Unlock for 1 Month
Rated 4.8/5 from over 1000+ reviews
- Unlimited Exact Practice Test Questions
- Trusted By 200 Million Students and Professors
What’s Included:
- Unlock Actual Exam Questions and Answers for BIOL-203-604 2025 FA Anatomy and Physiology I at Howard Community College on monthly basis
- Well-structured questions covering all topics, accompanied by organized images.
- Learn from mistakes with detailed answer explanations.
- Easy To understand explanations for all students.
Free BIOL-203-604 2025 FA Anatomy and Physiology I at Howard Community College Questions
Which of the following structures is not part of the CNS?
- spinal cord
- brain
- nerve
Explanation
Explanation
The central nervous system (CNS) consists of the brain and the spinal cord. These structures are responsible for processing and transmitting information throughout the body. Nerves, however, are part of the peripheral nervous system (PNS), which connects the CNS to the rest of the body. Nerves transmit sensory and motor information to and from the CNS, but they are not themselves considered part of the CNS.Correct Answer Is:
C. nerveThe function of thyroid hormones (T3 and T4) is to:
- act on the kidney to conserve water
- regulate growth and increase metabolic rate
- decrease metabolic rate and activate digestion
- stimulate short-term stress response
Explanation
Explanation
Thyroid hormones, including triiodothyronine (T3) and thyroxine (T4), play a crucial role in regulating the body's metabolism. They increase the metabolic rate, which influences the production of energy and the efficiency of cellular processes. Additionally, thyroid hormones are important for growth and development. They do not regulate water conservation in the kidneys or stimulate short-term stress responses, which are functions of other hormones like aldosterone or cortisol.Correct Answer Is:
B. regulate growth and increase metabolic rateThe hormone secreted by the pineal gland in the brain is:
- Melatonin
- Estrogen
- Epinephrine
- Dopamine
Explanation
The pineal gland in the brain secretes melatonin, which is a hormone that helps regulate the sleep-wake cycle (circadian rhythms). Melatonin levels typically increase in the evening, promoting sleep, and decrease during the day, helping to regulate the body’s internal clock. It plays a crucial role in the regulation of sleep patterns and the timing of biological rhythms.
The area of the retina where the most cones can be found is the:
- Cornea
- Sclera
- Fovea centralis
- Optic disc
Explanation
The fovea centralis is the area of the retina where the highest concentration of cones is located. Cones are responsible for color vision and high visual acuity (sharpness). The fovea is at the center of the macula lutea, and it provides the clearest and most detailed vision when looking directly at an object.
When a muscle generates tension but does not change in length, the contraction is called:
- concentric
- isotonic
- isometric
- eccentric
Explanation
Explanation
An isometric contraction occurs when a muscle generates tension, but its length does not change. This happens when the muscle is held at a constant length while producing force. A common example of this is holding a weight in place without moving it. In contrast, concentric and eccentric contractions involve a change in muscle length, while isotonic contractions involve movement but typically with a change in muscle length, either shortening or lengthening.Correct Answer Is:
C. isometricThe inside of a muscle fiber membrane has a/n ______ charge compared to the outside.
- positive
- equal
- negative
Explanation
Explanation
In a resting muscle fiber (or any resting cell), the inside of the membrane is negatively charged relative to the outside. This difference in charge is known as the resting membrane potential and is maintained by the sodium-potassium pump, which actively transports sodium out of the cell and potassium into the cell. This creates a negative charge inside the cell and a positive charge outside.Correct Answer Is:
C. negativeThe cranial nerve that carries most of the parasympathetic innervation throughout the body is the
- vagus nerve (CN X)
- trigeminal nerve (CN V)
- facial nerve (CN VII)
- accessory nerve (CN XI)
Explanation
Explanation
The vagus nerve (cranial nerve X) provides the majority of parasympathetic output to thoracic and abdominal viscera, including the heart, lungs, and most of the digestive tract. It is a key component of the "rest-and-digest" response. The trigeminal nerve (CN V) is primarily sensory for the face and motor for mastication; the facial nerve (CN VII) carries some parasympathetic fibers to salivary and lacrimal glands but not widely throughout the body; and the accessory nerve (CN XI) innervates sternocleidomastoid and trapezius muscles and is not parasympathetic.Correct Answer Is:
A. vagus nerve (CN X)The autonomic division of the nervous system:
- Carries sensory information from skin to brain
- Controls all non-voluntary functions
- Contains only the brain and spinal cord
- Controls all voluntary movements
Explanation
The autonomic nervous system (ANS) controls involuntary, non-voluntary functions such as heart rate, digestion, respiratory rate, and blood pressure. It regulates the function of smooth muscles, cardiac muscles, and glands. The ANS operates largely unconsciously and is divided into the sympathetic and parasympathetic branches, which are responsible for the "fight or flight" and "rest and digest" responses, respectively.
Which of these is true of an action potential?
-
Options:
A. fades out as it moves along the membrane - can travel to the dendrites
- it moves from the axon hillock to the axon terminal
- can be a depolarization or hyperpolarization
Explanation
Explanation
An action potential is a brief, all-or-nothing electrical signal that is initiated at the axon hillock when the membrane potential reaches threshold. It then propagates in one direction along the axon toward the axon terminal without fading due to regenerative voltage-gated sodium and potassium channels. Action potentials do not travel backward into the dendrites (B), do not fade out (A), and are specifically a depolarization event followed by repolarization; they are not hyperpolarizations (D), though hyperpolarization can occur during the after-hyperpolarization phase but is part of the same event.Correct Answer Is:
C. it moves from the axon hillock to the axon terminalAfferent nerves conduct impulses from:
- central nervous system to receptors
- effectors to the central nervous system
- receptors to the central nervous system
- the central nervous system to effectors
Explanation
Explanation
Afferent nerves (also known as sensory nerves) carry sensory information from receptors (such as those in the skin, eyes, or other sensory organs) to the central nervous system (CNS), where the information is processed. In contrast, efferent nerves carry motor signals from the CNS to the effectors (muscles or glands).Correct Answer Is:
C. receptors to the central nervous systemHow to Order
Select Your Exam
Click on your desired exam to open its dedicated page with resources like practice questions, flashcards, and study guides.Choose what to focus on, Your selected exam is saved for quick access Once you log in.
Subscribe
Hit the Subscribe button on the platform. With your subscription, you will enjoy unlimited access to all practice questions and resources for a full 1-month period. After the month has elapsed, you can choose to resubscribe to continue benefiting from our comprehensive exam preparation tools and resources.
Pay and unlock the practice Questions
Once your payment is processed, you’ll immediately unlock access to all practice questions tailored to your selected exam for 1 month .