Question 1

Which of the following best describes the difference between positive and negative feedback mechanisms in homeostasis?

Accepted Answer

Negative feedback reduces the deviation from a set point, while positive feedback increases the deviation.

Question 2

Which of the following is an example of active transport across a cell membrane?

Accepted Answer

The Na	extsuperscript{+}/K	extsuperscript{+} pump moving ions against their concentration gradients

Question 3

A patient is given intravenous fluids containing a solution with a higher solute concentration than their blood plasma. What type of solution is this, and what effect will it have on the patient's red blood cells?

Accepted Answer

Hypertonic; cells will shrink due to water loss

Question 4

Which tissue type is responsible for transmitting electrical impulses throughout the body?

Accepted Answer

Nervous tissue

Question 5

Which of the following best describes the function of osteoclasts in bone tissue?

Accepted Answer

They break down bone matrix, releasing calcium into the blood.

Question 6

A patient suffers a fracture in the diaphysis of their femur. Which part of the bone is affected?

Accepted Answer

The shaft of the bone

Question 7

Which of the following best explains why skeletal muscle fibers appear striated under a microscope?

Accepted Answer

They contain alternating bands of actin and myosin filaments.

Question 8

During muscle contraction, which ion is released from the sarcoplasmic reticulum to initiate the interaction between actin and myosin?

Accepted Answer

Calcium (Ca	extsuperscript{2+})

Question 9

Which of the following is a function of the cerebellum?

Accepted Answer

Coordination of voluntary muscle movements

Question 10

Which structure is part of the peripheral nervous system (PNS) but not the central nervous system (CNS)?

Accepted Answer

Spinal nerves

Question 11

Which of the following best describes the process of depolarization in a neuron?

Accepted Answer

Sodium ions move into the cell, making the inside more positive.

Question 12

A patient has damage to Broca's area in the left frontal lobe. Which function is most likely to be impaired?

Accepted Answer

Producing coherent speech

Question 13

Which of the following is true regarding the autonomic nervous system (ANS)?

Accepted Answer

It is divided into sympathetic and parasympathetic divisions.

Question 14

Which neurotransmitter is released by motor neurons at the neuromuscular junction to stimulate muscle contraction?

Accepted Answer

Acetylcholine

Question 15

A patient is unable to feel pain or temperature on the left side of their body below the neck. Which part of the spinal cord is most likely damaged?

Accepted Answer

Right lateral spinothalamic tract

Question 16

Which of the following best describes the function of the thalamus?

Accepted Answer

Acts as a relay station for sensory information to the cerebral cortex

Question 17

Which of the following is a characteristic of gray matter in the central nervous system?

Accepted Answer

It contains neuron cell bodies and dendrites.

Question 18

Which of the following best explains why the resting membrane potential of a neuron is negative?

Accepted Answer

The cell membrane is more permeable to potassium ions, which diffuse out of the cell.

Question 19

Which of the following is a function of the sympathetic division of the autonomic nervous system?

Accepted Answer

Dilates pupils and increases heart rate

Question 20

A patient is unable to move their right arm but can still feel sensation in it. Which part of the spinal cord is most likely damaged?

Accepted Answer

Right ventral horn

Comprehensive Study Notes: Human Anatomy and Physiology I (Final Exam Guide)

Study Guide - Practice Questions

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