What are the environmental changes that organisms respond to called?

Stimuli

True or False: Plants have a nervous system like animals.

False. Plants do not have nervous systems or muscles like animals.

Which receptors help us detect different tastes on our tongue?

Gustatory receptors

The branch-like structures that receive messages from other neurons are called _____.

Dendrites

What is the chemical junction between axon of one neuron and dendrites of another called?
A) Synapse
B) Axon
C) Cell body
D) Dendrite

A) Synapse

When you touch a hot object and immediately pull your hand back, what type of action is this?

Reflex action

Which part of the brain is responsible for thinking and voluntary actions?

Fore-brain (Cerebrum)

True or False: The cerebellum controls involuntary actions like blood pressure.

False. The medulla controls involuntary actions like blood pressure. The cerebellum controls posture and balance.

The brain is protected by a bony structure called the _____.

Cranium or skull

What protects the spinal cord from damage?

Vertebral column or backbone

How do plant cells change shape to create movement?

By changing their water content, causing swelling or shrinking

What type of tropism occurs when shoots grow toward light?
A) Negative phototropism
B) Positive geotropism
C) Positive phototropism
D) Hydrotropism

C) Positive phototropism

True or False: All plant movements are related to growth.

False. Plants show two types of movement - some related to growth and others not related to growth.

The growth of pollen tube toward ovule is an example of _____.

Chemotropism

Which plant hormone is synthesized at the shoot tip and helps in phototropism?

Auxin

Riddle: I am known as the stress hormone in plants and cause wilting of leaves. What am I?

Abscisic acid

What type of glands are endocrine glands?
A) Glands with ducts
B) Ductless glands
C) Exocrine glands
D) Salivary glands

B) Ductless glands

Why is the pituitary gland called the 'master gland'?

Because it controls the secretions of all other endocrine glands

Under-secretion of growth hormone in children causes _____.

Dwarfism

True or False: Iodine deficiency can lead to goitre.

True. Iodine is required to synthesize thyroxine, and its deficiency leads to goitre.

Which two hormones from pancreas regulate blood sugar levels antagonistically?

Insulin and glucagon

A student feels his heart racing during an exam. Which hormone is likely responsible?
A) Insulin
B) Thyroxine
C) Adrenaline
D) Testosterone

C) Adrenaline

What happens when blood sugar levels rise in the body?

Pancreatic cells produce more insulin to lower blood sugar levels

True or False: Hormonal control is faster than nervous control.

False. Hormonal control is slower than nervous control but can reach all body parts.