Nervous control
Hormones
Homeostasis
Tropic responses
Tropic responses Part
100
What are two parts of the central nervous system
1. Brain
2. Spinal Cord
100
What is the definition of a Hormone?
A chemical substance, produced by a gland and cause a response in organ.
100
Define Hemeostasis
The maintenance of a constant internal environment
100
Define Phototropism
A response in which plants grow towards or away from the direction in which the light is coming.
100
Identify two types of Tropisms and state what they respond to.
Phototropism- light
Gravitropism- gravity
200
What is the difference between involuntary and voluntary muscles?
Involuntary muscles are the muscles that cannot be controlled where voluntary muscles you can control.
200
Where do glands send substances that they produced?
Into the blood stream.
200
Give one example of Homeostasis.
Any two from these:
Temperature
Blood pressure
PH
200
What are the two most important stimuli for plants?
1. Light
2. Gravity
300
Which component of a reflex arc detects the initial stimulus?
A Receptor
300
Finish of the sentence: When it is released, the hormone that affects the pulse rate is known as...
Adrenaline
300
When exercising, the body’s internal temperature begins to rise. Through homeostatic mechanisms, the body responds by reducing its temperature. Which of the following is not an autonomic response to a rise in body temperature?
A) Sweating
B) Vasodilation
C) Piloerection
D) Increased Thirst
Correct Answer
C) Piloerection
300
which part of the shoot is most sensitive to light?
The tip of the shoot,
400
What is the main difference in functions between the sensory neuron and motor neuron?
The sensory delivers information from the receptors to the century nervous system.
The motor neuron delivers reply what to do from the century nervous system to the effectors.
400
Which of the following is not a response to the hormone adrenaline?
A) increased blood supply to muscles
B) Increased heart rate
C) Increased breathing rate
D) Lower blood glucose
Correct Answer: Lower blood glucose (D)
400
What part of the brain is at the center of control mechanism that keep the internal temperature constant?
Correct answer:
Hypothalamus
400
How does a plant respond to gravity?
Describe in terms of roots and stems.
The roots respond positively, growing down, into the soil. The stems Respond negatively, growing upward, to reach the sunlight.
500
Identify the 5 parts of the reflex arc.
1. Stimuli
2. Sensory neuron
3. Relay neurone
4. Motor neurone
5. Muscle effector
500
Explain the secretion of adrenaline.
Adrenaline is released from adrenal glands which are activated by connecting to the nerves. This process happens relatively quickly and caused by a stressful event.
500
Name parts A,D,E,F,G on the picture below.
D) Hair follicle
A) Epidermis
E) Dermis
F) Hypodermis (Subcutaneous tissue)
G) Sensory nerve endings
B) Sebaceous gland
I) Sensory neuron
H) Muscle
K) Arteriole
500
Fill in missing words in the sentence below:
- Plants use (a) to regulate the differential growth of a plant organ, causing the plant to curve or bend in response to a (b).
a) hormones
b) hormones