Bio102_Exam 1_Possible 20 questions

Negative

Mechanisms that promote homeostasis often employ (A. negative or B. Positive) feedback loops.

Epithelium

One would expect to find _______ tissue at a barrier or an interface.

Smooth

Smooth muscle tissue is composed of _______ myocytes.

False

(True or False) All poikilotherms are ectotherms but all ectotherms are not poikilotherms

Cells

Tissues are composed of _____ and extracellular matrix (ECM).

Vitamin D

An excess of the vitamin (A. Folic acid or B. Vitamin D) can lead to health risks.

Pancreas

Name the accessory gland of the digestive system that secretes an alkaline (basic) solution containing bicarbonate, proteases, peptidases, lipases, nucleases, and amylase into the duodenum.

True

(True or False): A malnourished person could be suffering from both overnourishment and undernourishment.

Zymogen

Enzymes that are secreted in an inactive form (like pepsinogen to pepsin) but are modified to become active in a specific environment are called _______ .

Bile

_____ is made by the liver and secreted by the gallbladder into the small intestine to emulsify fats.

A. closed

Humans unlike arthropods have a (________) circulatory system in which the blood is confined to the veins and arteries.

Arteries

_______ are blood vessels that carry blood from the heart.

False

True or False: Blood from the superior and inferior vena cava enters the right atrium of the heart, but it returns from the pulmonary system to enter the left ventricle.

Partial Pressure

CO2 diffuses out of the blood stream and into the lungs because the (_________) of CO2 is lower in the lungs than in the alveolar capillary beds.

Atrioventricular Valve

Name the type of valve between the atrial and ventricular chambers of the heart.(___________)

Nephron

The functional unit of the kidney is the (_______) which contains the renal corpuscle, proximal tubule, loop of Henle, distal tubule, and associated vasculature like the vasa recta.

Kidneys

The (_____) removes the toxic byproducts of metabolism from the bloodstream for excretion.

Loop of Henle

The (______) is the part of the juxtamedullary nephron that descends into the solute gradients of the adrenal medulla to regulate osmotic homeostasis by returning salt and water to the body.

True

(True or False) if a solute is in an aqueous solution then by definition a hydration shell has formed around it.

Glomerulus

Blood pressure indiscriminately forces fluid and small molecules out of the (_____) generating the filtrate within Bowman’s capsule.