Biology unit 2 (test 1)

Question 1

Stage 1 of mitosis

Answer 1

Chromosomes double up and shorten

Question 2

Stage 2 of mitosis

Answer 2

Chromosomes line up on the equator of the cell

Question 3

Stage 3 of mitosis

Answer 3

Spindle fibres pull the chromatids to either pole of the cell

Question 4

Stage 4 of mitosis

Answer 4

New nuclear membranes form and the cell splits into 2 daughter cells.

Question 5

What is cell division

Answer 5

Mitosis

Question 6

What are the 2 cells called in (mitosis)

Answer 6

Parent cell, daughter cell

Question 6

What does cell division do

Answer 6

Increases the number of cells in an organism and replaces damaged or dead cells

Question 7

When a cell has the full number of chromosomes it needs. It is called…

Answer 7

Diploid

Question 8

If it has half the number. It is called..

Answer 8

Haploid

Question 9

Cell division is very important and has to be very controlled, if it’s uncontrolled…

Answer 9

Tumours can form

Question 10

Sperm cell function

Answer 10

To swim to the egg and fertilise the egg

Question 11

How is a sperm cell specialised for that function

Answer 11

The tail helps it swim to the egg

Question 12

Function of root hair cells

Answer 12

Is to absorb water

Question 13

How is a hair root cell specialised to preform its action

Answer 13

It has a projection to increases surface area, which makes it move efficiently for absorbing water

Question 14

Example of plant tissue, animal tissue

Answer 14

Plant= phloem, xylem
Animal= muscle nerve

Question 15

What is tissue

Answer 15

A group of specialised cells working together

Answer 16

Cells, tissue, organs, system, organisms

Question 17

What is an organ

Answer 17

A group of tissues working together to preform a specific function, example the stomach in an animal and the vascular bundle in plants

Question 18

Where are chromosomes found

Answer 18

Nucleus of the cell

Question 19

When does mitosis occur

Answer 19

When more cells are needed

Question 20

Smooth muscle cell

Answer 20

It can contrast to bring about movement

Question 21

What do smooth muscle cells do in the stomach

Answer 21

Can contract which allow the stomach to mix food with digestive juices

Question 22

Vascular bundle contains

Answer 22

Xylem and phloem

Question 23

Where are receptors found

Answer 23

In the cell membrane of the target cells

Question 24

Example of hormone

Answer 24

Human growth hormone

Question 25

Medulla

Answer 25

Controls heart rate and breathing rate (dull stuff)

Question 26

Cerebrum

Answer 26

Controls personality, feelings, memory, conscious, thoughts, decision making (brumbrum drives you)

Question 27

Cerebellum

Answer 27

Controls balance and muscle coordination (bell at the base of the brain)

Question 28

Inter neuron

Answer 28

In the spinal cord sends electrical messages to motor neuron

Question 29

Motor neuron

Answer 29

Sends electrical message to an effector

Question 30

Sensory neuron

Answer 30

Sends an electrical message to inter neuron

Question 31

Endocrine glands

Answer 31

Pancreas

Question 32

Hormones

Answer 32

Insulin, glucagon

Question 33

Target organ

Answer 33

Liver

Question 34

What do you need when blood is increased

Answer 34

Insulin

Question 35

What do you need when blood is decreased

Answer 35

Glucagon

Question 36

What causes increase in blood and decrease

Answer 36

Increase = if you eat too much sugar Decrease = if you don’t eat