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Biology
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13 Dec 2019

1. GLUT-2 transporter molecules are found:

A) in the blood.

B) in the plasma membrane of beta cells.

C) in the intracellular membranes of beta cells.

2. Homeotherms:

A) elevate their body temperature and maintain it within a defined range.

B) elevate their body above the ambient temperature.

C) allow their body temperature to fluctuate with the ambient temperature.

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17 Dec 2019
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Related questions

part 1

Homeostasis: Response to Stimuli

From the examples below, select the examples of cells or organisms responding to stimuli in order to maintain homeostasis.

1.)A plant bending toward a light source

2.)A cell bursting because it takes up too much water

3.)A person shivering when their body temperature is low

4.)A unicellular organism beating microscopic hairs to escape a chemical pollutant in its environment

5.)A cell dying due to a chemical poison

6.)An animal growing larger

7.)Ants moving within their mounds depending upon the time of day

8.)Iguanas laying in the sunlight if their body temperature is low

9.)Birds migrating when seasons change

10.)A person or animal getting sick because of infectious bacteria

part2 fill in the blank

A state of biological balance, or ____________ , is important for the survival of individual cells and ____________ alike.

Physiological factors such as ____________ , water levels, and pH must remain within a certain ____________ for cells and organisms to remain healthy and functional.

Regulation of the ____________ environment of cells and organisms is carried out through ____________ and other control ____________ .

choice of words:

location

external

hormones

mechanism

homeostasis

internal

groups

feedback

oganisms

temperature

range

All of the following are true regarding NK cells EXCEPT

Select one:

a. they are found in tissues of the lymphatic system.

b. they have the ability to kill infected body cells and some tumor cells.

c. they are a type of lymphocyte.

d. they release toxic substances that cause cell lysis or apoptosis.

e. they destroy infected body cells by phagocytosis.

Question 67

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Question text

Which of the following antibodies is a pentamer?

Select one:

a. IgE

b. IgM

c. IgD

d. IgA

Question 68

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When haptens attach to carrier molecules, an epitope forms on hapten which then can be bound to antibody.

Select one:

True

False

Question 69

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Question text

A chill is a sign that

Select one:

a. the metabolic rate is decreasing.

b. body temperature is not changing.

c. body temperature is rising.

d. body temperature is falling.

e. blood vessels are dilating.

Question 70

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Question text

Biofilms provide pathogens with an adhesion mechanism and aid in resistance to antimicrobial agents.

Select one:

True

False

1. Nonspecific defenses usually come into play before the body's specific defense system is relied upon. Which of following nonspecific defenses is mismatched?

a. inflammation-- reddening, swelling, and tissue repair

b. fever-- elevation of body temperature to kill invading agents

c. mucus production-- allows B-cells to maneuver within mucus and secrete antibodies

d. complement-- inflammation and lysis of pathogen

e. physical barriers-- skin and mucous membranes

2. Circulating immunoglobulins (antibodies) are synthesized by this class of cells.

a. T-lymphocytes

b. bone marrow stem cells

c. neutrophils

d. activated B- cells

e. none of the above

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