Give 3 examples of asexual reproduction methods in plants.

A hormone that controls a person’s appetite might bind to ____________ proteins on membranes in the brain.

What is the typical site of origin of leptin hormone?

In a normal person, what is the effect of elevated leptin levels in the bloodstream?

Life’s Responsiveness

If a bog plant designed to catch insects proves unable to do so, the result will be starvation for ____________.

Why does a living thing need to be responsive?

Based on Figure 11.5 in your text, what is the role of homeostatic mechanisms?

When an environmental change shifts an organism’s internal chemistry toward a new state, the organism’s response is to try to return its chemistry toward the original state. This tendency on the organism’s part is called ____________.

Responsiveness at the Transcriptional Level

In the lactose operon of E. coli, what causes the repressor protein to change its shape?

What is the resultant effect of the repressor protein’s shape change on lactose gene expression?

When there is little or no lactose present in a bacterium’s environment, then the gene for the lactose transport enzyme is not trans-____________ and trans-____________.

When there is little or no lactose present in a bacterium’s environment, then the gene for the ____________ breakdown enzyme is not transcribed and translated.

When there is little or no lactose present in a bacterium’s environment, then the ____________ sequence in the DNA is bound by a repressor protein.

When there is little or no lactose present in a bacterium’s environment, then the ____________ operon is shut down.

When the lactose operon is functioning, the bacterium can ____________ and break down lactose because ____________ and degradation genes are being transcribed.

Responsiveness at the Cellular Level

After a fly trips the sensory hair on the modified leaf of a Venus flytrap, what is the very next step in the closing process?

According to Figure 11.10, list the complete sequence of chemical events in the closure of a Venus flytrap.

In the Venus flytrap, the enzyme expansin helps to close the trap by loosening the ____________ in the plant’s cell walls.

Once ____________ has weakened the cellulose in the walls of the leaf trap cells, ____________ rushes into the cells, expanding them and closing the trap.

Responsiveness at the Organ System Level

The suprachiasmatic nuclei in the brain help the human nervous system to respond to daily alterations in ____________ and ____________.

The ____________ ____________ enable the nervous system to respond to light/dark alterations through their stimulation of the pineal ____________ in the center of your head.

The human nervous system responds to daily alterations in light and darkness by influencing melatonin levels in the ____________.

The human nervous system responds to daily alterations in light and darkness by controlling how much melatonin reaches the ____________ nuclei.

The human nervous system responds to daily alterations in light and darkness by modulating the amount of ____________ secretion of the hypothalamus.

The human nervous system responds to daily alterations in light and darkness by influencing ____________ levels secreted by the thyroid gland.

The human nervous system responds to daily alterations in light and darkness by changing the basal ____________ rate of your cells.

One effect of melatonin on the suprachiasmatic nuclei is that it corrects the ____________ of their day/night signaling system.

What is the general effect of decreasing melatonin levels in the body?

List 5 different reasons some individuals take a melatonin supplement.

Informational Continuity in Organisms

Biological information is preserved within the base sequence of what molecule?

Reproduction: Asexual and Sexual

Asexual Reproduction