Biology-Sensitivity

Question 1

life process

What is sensitivity?

Answer 1

Sensitivity is the abillity for all living orgnaisms to detect and respond to stimuli.

Question 2

What is a stimuli

Answer 2

A stimuli is a change in the internal or external environment.

Question 3

What is a response

Answer 3

A response is a change in activity as a result of stimuli

Question 4

List 4 ways in wwhich sensitivity is important. With reason

Answer 4

1. Finding mates
2. Finding food
3. Fleeing from danger
4. Finding the right conditions to produce or attain food/ nutrittion

Question 5

What are the two ways plants respond to stimuli

Answer 5

Nastic Movement and Tropism

Question 6

What is phototropism

Answer 6

Phototropism is the ability for a a plant or anyother photosynthesizing organism to respond directionally to light.

Question 7

Types of phototropism

Answer 7

Positive and Negavtive

Question 8

What is the hormone that allows for cell elongation in plants?

Answer 8

Auxin

Question 9

Where are auxins fused in plant?

Answer 9

The side that is away from the light

Question 10

What is geotropism

Answer 10

Geotropism is the growth resposne of a plant due to the pull of gravity

Question 11

Words to descibe Tropism

Answer 11

Slow, Irreversible, directional

Question 12

What is Nastic Movement

Answer 12

Nastic Movement is the non-directional response to stimuli in plants

It is generally due to the chnage in pressure meaning loss of water from

Question 13

Words to describe Nastic Movement

Answer 13

Non- directioanl, Fast, Generally reversible

Question 14

List three funcctions of the skin

Answer 14

1. Temperature Regualtion, sweating, vasodilation, vasoconstiction (homeostasis)
2. Serves as a protective layer; cornified layer, keratin
3. Plays a small role in excretion; sweating