Chapter 20, Problem 4CEQ

a.

Summary Introduction

To determine: The joint positions or motions that occur at the left knee and at the left ankle when standing upright and holding on the back of a chair for balance and rising up on the toes as high as possible.

Introduction: A joint is a connection between the bones. The joints allow different types of movement at different degrees.

b.

Summary Introduction

To determine: Whether the left gastrocnemius is shortening or elongating over the knee in the given position.

c.

Summary Introduction

To determine: Whether the gastrocnemius is shortening or elongating over the ankle in the given position.

d.

Summary Introduction

To determine: Whether the soleus has an action at the knee in the given condition.

e.

Summary Introduction

To determine: Whether the soleus is shortening or elongating over the ankle.

f.

Summary Introduction

To determine: The reason why the gastrocnemius is stronger than the soleus in the given position.