When blood glucose increases: $$\text{Insulin} \uparrow$$, $$\text{Glucagon} \downarrow$$

Question 1

Which of the following best describes the function of the medulla oblongata in the human brain?

Accepted Answer

It controls autonomic functions such as heart rate, breathing, and blood pressure.

Question 2

During a lumbar puncture, cerebrospinal fluid (CSF) is collected from which anatomical region?

Accepted Answer

From the subarachnoid space between lumbar vertebrae L3 and L4 or L4 and L5.

Question 3

Which of the following is NOT an ingredient of cerebrospinal fluid (CSF)?

Accepted Answer

Red blood cells

Question 4

A patient presents with vision problems due to dysfunction of the aqueous humor. Which of the following is a likely consequence?

Accepted Answer

Increased intraocular pressure leading to glaucoma

Question 5

Which equation correctly represents the relationship between blood glucose, insulin, and glucagon in homeostasis?

Accepted Answer

When blood glucose increases: $$	ext{Insulin} \uparrow$$, $$	ext{Glucagon} \downarrow$$

Question 6

Which of the following best describes the 'all or nothing' principle of action potentials?

Accepted Answer

An action potential occurs only if the stimulus is above threshold; otherwise, no action potential is generated.

Question 7

Which hormone is produced by the adrenal cortex and is essential for regulating sodium and potassium balance?

Accepted Answer

Aldosterone

Question 8

Which of the following is a characteristic of steroid hormones?

Accepted Answer

They bind to receptors inside the cell and directly influence gene expression.

Question 9

Which of the following best explains why iodine is essential for hormone function?

Accepted Answer

Iodine is required for the synthesis of thyroid hormones.

Question 10

Which of the following is a function of the limbic system?

Accepted Answer

Regulation of emotions and memory formation

Question 11

Which of the following best describes the function of Schwann cells?

Accepted Answer

They form myelin sheaths around axons in the peripheral nervous system.

Question 12

Which of the following is a property shared by all muscle tissues?

Accepted Answer

Excitability

Question 13

A patient is diagnosed with osteoporosis. Which bone characteristic is most responsible for resistance to shattering?

Accepted Answer

Collagen fibers within the bone matrix

Question 14

Which of the following is an example of a positive feedback loop in the human body?

Accepted Answer

Release of oxytocin during childbirth to intensify uterine contractions

Question 15

Which of the following is NOT a general sense?

Accepted Answer

Vision

Question 16

Which of the following best describes the function of troponin in muscle contraction?

Accepted Answer

Troponin binds calcium ions, allowing actin and myosin interaction.

Question 17

Which of the following best describes the function of the lacrimal apparatus?

Accepted Answer

It produces and drains tears to lubricate and protect the eye.

Question 18

Which of the following is the correct charge for a neutron?

Accepted Answer

0 (neutral)

Question 19

Which of the following best describes the function of astrocytes in the central nervous system?

Accepted Answer

They maintain the blood-brain barrier and provide structural support.

Question 20

Which of the following is a real-life example of a gomphosis joint?

Accepted Answer

The joint between a tooth and its socket in the jaw

BIO 207 Final Exam Study Guide: Anatomy & Physiology Comprehensive Review

Study Guide - Practice Questions