Question

1:Phloem requires facilitated diffusion to move sugars and other dissolved molecules in any direction.
A:True
B:False

2:Which of the following mechanisms correctly describes how signals are passed between two neurons?
A:Terminal buds release neurotransmitter that travel across the synapse to connect with membrane receptors on the dendrites of another neuron
B:An electrical signal passes from the terminal buds of one neuron to the dendrites of another neuron.
C:An electrical signal passes from the dendrites of one neuron to the terminal buds of another neuron.
D:Glial cells help an electrical signal passing down an axon cross the synapse to the dendrites of another neuron.
3:Which of the following is the best description of homeostasis?
A:Maintaining an internal equilibrium.
B:Maintaining body shape.
C:The constant interaction of the internal and external environments around an organism.
D:Continually adjusting to changing environmental conditions.
4:Nervous tissue is a key component of managing many homeostatic variables because of which function that it performs?
A:Directly controls fluid balance.  
B:Directly controls water balance.
C:performs different actions in response to environmental conditions.
D:Senses environmental conditions.

Answer 1

1:Phloem requires facilitated diffusion to move sugars and other dissolved molecules in any direction.

b. False

The food in the form of sucrose is transported by the vascular tissue phloem. ... The transportation occurs in the direction of the source to sink.

2:Which of the following mechanisms correctly describes how signals are passed between two neurons?

A:Terminal buds release neurotransmitter that travel across the synapse to connect with membrane receptors on the dendrites of another neuron.

3:Which of the following is the best description of homeostasis

A:Maintaining an internal equilibrium.

Explanation- Homeostasis, any self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival. The stability attained is actually a dynamic equilibrium, in which continuous change occurs yet relatively uniform conditions prevail.

4:Nervous tissue is a key component of managing many homeostatic variables because of which function that it performs-

C:performs different actions in response to environmental conditions.

Explanation- The nervous system allows an organism to respond quickly to changes in the internal or external environment. The responses to the stimuli are short-lasting.

Ps- a positive rating would be highly appreciated

Thanks