Which of the following functions as both an endocrine and exocrine gland?
Pancreas
Pituitary
Thyroid
Hypothalamus
The Correct Answer is A
a. Pancreas: The pancreas has both endocrine functions (releasing insulin and glucagon into the blood) and exocrine functions (secreting digestive enzymes into the small intestine).
b. Pituitary: This is an endocrine gland only, releasing hormones into the bloodstream.
c. Thyroid: This is also an endocrine gland, producing hormones like thyroxine and triiodothyronine.
d. Hypothalamus: The hypothalamus primarily functions as part of the endocrine system, regulating the pituitary gland and releasing hormones into the blood.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a. Purkinje fibers: Purkinje fibers are the last structures to receive the signal within the ventricles, causing them to contract.
b. Bundle of His: The correct sequence of the cardiac conduction system is as follows: The electrical impulse originates in the sinoatrial (SA) node, then travels to the atrioventricular (AV) node. From the AV node, the impulse travels to the Bundle of His. After the Bundle of His, the impulse travels through the bundle branches and finally reaches the Purkinje fibers, which facilitate the contraction of the ventricles.
c. Bundle branches: The electrical impulse for heartbeat originates in the SA node (sinoatrial node). It then travels to the AV node (atrioventricular node), which delays the signal before sending it to the Bundle of His. The Bundle of His splits into right and left bundle branches, which distribute the electrical signal to the Purkinje fibers in the ventricles, causing them to contract in a coordinated fashion.
d. SA node: The SA node initiates the electrical impulse, not receive it after the AV node.
Correct Answer is D
Explanation
a: Contracts and brings about movement - This describes the function of muscle tissue, not connective tissue.
b: Generates and transmits impulses - This describes the function of nervous tissue, not connective tissue.
c: Covers and lines body surfaces - This describes the function of epithelial tissue, not connective tissue
d. Binds tissue together and supports structures: Connective tissue serves to bind, support, and protect other tissues and organs of the body. It also plays a role in insulation, storing energy, and transporting substances.
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