BIO 2401 Anatomy and Physiology Exam at Central Alabama Community College
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Free BIO 2401 Anatomy and Physiology Exam at Central Alabama Community College Questions
Which brain covering is called the "gentle mother"?
- Dura mater
- Arachnoid mater
- Pia mater
Explanation
The pia mater is the innermost layer of the meninges, the protective coverings of the brain and spinal cord. It is referred to as the "gentle mother" because it is delicate and closely adheres to the surface of the brain, following its contours and covering the brain's blood vessels.
Which of the following transport mechanisms is a passive transport mechanism?
- Sodium-potassium pump
- Bulk transport
- Endocytosis
- Filtration
- Exocytosis
Explanation
Filtration is a passive transport mechanism that moves materials across a membrane from an area of high pressure to an area of low pressure. It does not require energy (ATP) to occur. Filtration is commonly seen in processes like kidney filtration and capillary exchange, where pressure forces water and solutes through the membrane.
The height of the sine wave which indicates the sound's intensity or energy is perceived as _.
- Frequency
- Decibels
- Loudness
- Compression
- Rarefactions
Explanation
The height of a sine wave, also known as its amplitude, corresponds to the intensity or energy of the sound. Loudness is the perception of sound intensity by the human ear, and it is directly related to the amplitude of the sound wave. A higher amplitude results in a louder sound, while a lower amplitude results in a softer sound.
Which area of the ear contains the pinna?
- Outer
- Middle
- Internal
Explanation
The pinna, also known as the auricle, is the visible, external part of the ear. It is located in the outer ear and serves to collect sound waves and direct them into the ear canal. The outer ear includes the pinna and the external auditory canal.
Which cell type is an immature cell for connective tissue proper?
- Chondroblast
- Chondrocyte
- Fibroblast
- Fibrocyte
- Osteoblast
- Osteocyte
- Hemocytoblast
- Hemocytocyte
Explanation
The fibroblast is the immature cell in connective tissue proper. Fibroblasts are responsible for producing the components of the extracellular matrix, such as collagen and elastin fibers, and they play a crucial role in tissue repair and maintenance. As they mature, they become fibrocytes, which are less active and maintain the matrix.
Which term would describe the coverings of the lungs?
- Pericardium
- Pleura
- Peritoneum
Explanation
The pleura is the membrane that surrounds and protects the lungs. It consists of two layers: the visceral pleura, which is attached directly to the lungs, and the parietal pleura, which lines the chest cavity. The pleura helps reduce friction during breathing.
Which type of transport moves materials down a concentration gradient?
- Active
- Passive
Explanation
Passive transport moves materials across the cell membrane down a concentration gradient, meaning from an area of higher concentration to an area of lower concentration. This process does not require energy (ATP). Common types of passive transport include diffusion, facilitated diffusion, and osmosis.
In contrast, active transport requires energy to move substances against the concentration gradient, from an area of lower concentration to an area of higher concentration. This process typically involves transport proteins and ATP.
Which bone marking term means a small, rounded projection?
- Tuberosity
- Crest
- Line
- Tubercle
- Condyle
- Epicondyle
- Spine
- Head
- I. Facet
- J. Ramus
- K. Meatus
- L. Sinus
- M. Fossa
- N. Sulcus
- O. Fissure
- P. Foramen
Explanation
A tubercle is a small, rounded projection or bump on a bone, often serving as a site for muscle attachment. Tubercle markings are commonly found on the surface of long bones.
Which of the following parts of the eye is the area where no photoreceptors are located?
- Macula lutea
- Fovea capitis
- Retina
- Optic disc
Explanation
The optic disc is the area of the retina where the optic nerve exits the eye. This region is often referred to as the "blind spot" because it lacks photoreceptors (rods and cones), which are responsible for detecting light and sending visual information to the brain. Since no photoreceptors are present in the optic disc, it cannot detect light.
When an eye is focusing on a distant object, which of the following is occurring?
- The eyeballs are rotating medially.
- The lens bulges.
- The ciliary muscles contract.
- The pupils dilate (open up).
Explanation
When focusing on a distant object, several changes occur in the eye:
- The pupils dilate to allow more light to enter the eye for better visual clarity.
- The lens flattens (not bulges) to allow for focus on distant objects. The lens bulges when focusing on near objects.
- The ciliary muscles relax (not contract) during distant vision, which causes the lens to flatten and focus on far objects.
- The eyeballs do not rotate medially when focusing on a distant object; medial rotation typically occurs when focusing on a near object (convergence).
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