HU - SC 254 Anatomy & Physiology II Midterm Exam Guide 2024

SC 254




Anatomy & Physiology II



MIDTERM EXAM GUIDE



2024

,1. Which of the following hormones is primarily responsible for regulating
blood calcium levels?

- A) Insulin
- B) Glucagon

- C) Parathyroid hormone
- D) Thyroxine

- Answer: C) Parathyroid hormone

- Rationale: Parathyroid hormone increases blood calcium levels by
stimulating osteoclasts to break down bone and release calcium.



2. Which part of the nephron is primarily responsible for the reabsorption
of water?

- A) Proximal convoluted tubule

- B) Loop of Henle

- C) Distal convoluted tubule
- D) Collecting duct

- Answer: B) Loop of Henle
- Rationale: The Loop of Henle, particularly the descending limb, is
highly permeable to water, allowing for significant reabsorption.



3. Which type of muscle fiber is most resistant to fatigue?

- A) Type I

, - B) Type IIa

- C) Type IIb

- D) Type III

- Answer: A) Type I

- Rationale: Type I muscle fibers, also known as slow-twitch fibers, are
highly resistant to fatigue due to their high mitochondrial content and
oxidative capacity.



4. Which of the following structures is not part of the limbic system?

- A) Amygdala
- B) Hippocampus

- C) Thalamus

- D) Hypothalamus
- Answer: C) Thalamus

- Rationale: The thalamus is primarily involved in sensory relay,
whereas the limbic system includes structures like the amygdala and
hippocampus that are involved in emotion and memory.



5. Which of the following is the primary function of the cerebellum?
- A) Sensory processing

- B) Motor coordination

- C) Language comprehension

- D) Emotional regulation