Explain why chemical reactions in the body are often irreversible.
What will be an ideal response?
Chemical reactions that release energy cannot be reversed unless energy is put back into the system. Also, the body may use the chemicals solely for its energy, such as glucose, or some reactions produce molecules in excessive quantities (like CO2 and NH4) that the body needs to discard.
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A 19-year-old, single, sexually active college student, who has not used birth control on a regular basis, is in her first trimester of pregnancy. She is at the OB/GYN clinic for her first prenatal visit
In assessing her nutrition, the nurse discovers that the patient drinks heavily on a regular basis. She also states she does not like milk. What information should the nurse give the patient regarding nutrition? What will be an ideal response
Answer the following statements true (T) or false (F)
1. Epinephrine is secreted in greater amounts than norepinephrine in the adrenal medulla. 2. The hormone somatostatin is secreted by beta cells. 3. The hormone glucagon is secreted by G-cells. 4. Insulin is secreted by beta cells.
Cross bridge interaction between actin and myosin in skeletal muscle is directly blocked by
a. acetylcholine b. triads c. Z lines d. calcium e. tropomyosin
Which of the following muscles are named based on their shape? (Check all that apply.)
A. Superior rectus B. Pectoralis major C. Deltoid D. Teres major E. Orbicularis oris