Jennifer W. GCSE Biology tutor, GCSE Physical Education tutor, A Leve...

Jennifer W.

£18 - £20 /hr

Currently unavailable: for new students

Studying: Sport and Exercise Science (Bachelors) - Bath University

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About me

Keen to help anyone struggling with Biology or PE GCSE! An enthusiastic Sport and Exercise Science student at the University of Bath with previous experience of tutoring. 

Keen to help anyone struggling with Biology or PE GCSE! An enthusiastic Sport and Exercise Science student at the University of Bath with previous experience of tutoring. 

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14/03/2015

Qualifications

SubjectQualificationGrade
BiologyA-level (A2)A
Psychology A-level (A2)A
Physical EducationA-level (A2)A

Subjects offered

SubjectQualificationPrices
Physical EducationA Level£20 /hr
BiologyGCSE£18 /hr
Physical EducationGCSE£18 /hr

Questions Jennifer has answered

Name two structural differences between arteries and veins.

1. Arteries have thick, elastic, muscular walls whereas veins have thin walls with few elastic fibres. 

Arteries need these properties to give them the strength and elasticity needed to cope with the high pressure surges of oxygenated blood coming from the heart. The elasticity allows the walls to recoil back to their original shape after they have increased in diameter to allow the surge of blood through. 

2. Veins have one-way valves whereas arteries do not have any valves.

Veins need valves as the blood flowing through them is at such a low pressure that they need something to prevent it going backwards! They are needed to prevent blood pooling. Arteries do not need valves as the blood is flowing at such a high pressure that it cannot go backwards. 

1. Arteries have thick, elastic, muscular walls whereas veins have thin walls with few elastic fibres. 

Arteries need these properties to give them the strength and elasticity needed to cope with the high pressure surges of oxygenated blood coming from the heart. The elasticity allows the walls to recoil back to their original shape after they have increased in diameter to allow the surge of blood through. 

2. Veins have one-way valves whereas arteries do not have any valves.

Veins need valves as the blood flowing through them is at such a low pressure that they need something to prevent it going backwards! They are needed to prevent blood pooling. Arteries do not need valves as the blood is flowing at such a high pressure that it cannot go backwards. 

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2 years ago

14646 views

What type of movement occurs at a) the hip and b) the knee during the downward phase of a squat?

First, think about the plane of movement that the action is occuring in. During a squat, the body looks the same when you cut it vertically down the middle. The movement is therefore occuring in the sagittal plane. The two movements that occur in this plane are flexion and extension therefore it must be one of these two. 

a) Flexion

The angle at the hip is getting smaller as you bend your trunk forwards towards your legs therefore it is flexion rather than extension. 

b) Flexion

Again this is due to a decrease in the angle between the bones at the joint. 

First, think about the plane of movement that the action is occuring in. During a squat, the body looks the same when you cut it vertically down the middle. The movement is therefore occuring in the sagittal plane. The two movements that occur in this plane are flexion and extension therefore it must be one of these two. 

a) Flexion

The angle at the hip is getting smaller as you bend your trunk forwards towards your legs therefore it is flexion rather than extension. 

b) Flexion

Again this is due to a decrease in the angle between the bones at the joint. 

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2 years ago

870 views

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